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Finding the Fourth Proportional to 450.98, 677.25 and 278.67

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Solution

The fourth proportional to 450.98, 677.25 and 278.67 is: 418.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.98 : 677.25 = 278.67 : x
  2. Step 2: Convert to fraction form
    450.98/677.25 = 278.67/x
  3. Step 3: Cross multiply
    450.98x = 677.25 × 278.67
  4. Step 4: Simplify right side
    450.98x = 188,727.86
  5. Step 5: Solve for x
    x = 188,727.86/450.98
  6. Step 6: Final answer
    x = 418.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.